Lip-slitting mechanism.



A. E. JOHNSON.

LIP SLITTING MECHANISM.

APPLICATION FILED SEPT- 30, l 9|5.

Patented. 0011. 23, 1917.

2 SHEETS-SHEET l.

A. E. JOHNSON. UP suwme MECHANISM.

, APPLICATION HLED SEPT-'30. 1915. 12%,944 Patented Oct. 23,1917.

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ALBERT E. .ionnson, OF BEVERLY, M-AssAcrInsErrs, assrenon TO UNITED SHOE MACHINERY country, or PATERSON, NEW JERSEY, A conronn'rxon or new f JERSEY. H

LIE-summer MECHANISM.

rate teaoct. 23,1917.

' Application filed SeptemberBO, 1915. Serial No. 53,398 i To all whom it may concern:

Be it known that I, ALBERT E. JoHNsoN, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Lip-slitting Mechanisms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. j

The-present invention relates to'an improvement in lip-slitting mechanisms for machines for operating on soles and more particularly, to an improvement in such mechanisms for machines for forming insoles of the general type known commer-,

cially as Economy insoles.

Insoles of the Economy type usually have a compound lip made by securing together an outer lip and an inner lip or flap, although the' outer lip may be omitted. The outer lip, in the type using a compound lip, is formed by splitting the margin of the insole parallel with its face; and the inner lip, in either type, is formed by cutting a channel downwardly and outwardly from the central portion of the insole to a locus of points whose distance from the bottom of the split is determined by the desired thickness of the between substance. In turning up the inner lip preparatory to applying reinforcing fabric to the blank, it has been found that the inner lip has a tendency to draw back from its upstanding position and assume the position in which it has been leftby the channeling knife. This is particularly the case about the more sharply curved portions of the insole. To obviate this undesirable tendency of the inner lip to lie in the channel and .to cause it to remain in upstanding position during later operations on the insole, mechanism has been provided for cutting a series of transverse slits in the outer margin of the inner lip. It has been found, however, that if the stock is particularly soft and pliable, mech.- anism which has heretofore been used for this purpose fails to perform its slitting operation properly.

The ob'ect of the present invention is, therefore, the production of a lip-slitting mechanismincluding a knife, having provision whereby the lip to be slit is operated upon in such manner that a transverse slit will be cut therein at each actuation of the lip-slitting mechanism, regardless of the state of pliability of the stock or low resistance offered by it to the cutting action of the slitting knife. To this end, the in vention consists of the improved lip-slit- I ting mechanism hereinafter described and particularly pointed out in the appended claims. a j I The principle'and mode of operation of the invention will be clearly understood, taken in conjunction withthe following description, from an inspection of the accompanying drawings of the preferred form of the invention in which:

Figure 1 is aside elevation of a channel ing machine to which the improved lip-slitting mechanism is applied; Fig. 2 is a front elevation of the machine; Fig. 3 is a per spective view of the toe portion of an insole illustrating the action of the slitting tool on the inner lip; Figs. 4, 5, and'6 are a rear end elevation, a side elevation, and a bottom plan respectively, of "the lip-slitting tool; and Fig. 7 is aperspective View of the same.

The channeling machine to which the im: proved lip-slitting mechanism is applied in the illustrated embodiment of the invention,

comprises a work support,'an edge splitting knifefor cutting and turning up an outer lip, a channeling knife for cutting obliquely into the insole to from an inner lip, a fourtmotion feeding device for engaging the work on the same side as the knives,'and a movable edge gage fordetermining the dis tance of the stitch receiving rib from the edge of the insole. The work supportindicated at 2. is rotatably supported in the frame of the machine and arranged for simultaneous movement with the four-motion feeding device in the direction of feeding. The edgesplitting knife land the channeling knife 6 are carried bya tool carrier" 8 having. a shank 10 mounted for vertical movement in a guideway 12. The fourmotion feeding device which is indicated at 14, imparts a step-by-step feeding move-' ment to the insole; and the edge gage for determining the distance of the channel from-"the edge of the sole is indicated at 16. A press-er foot 18 is provided for .limiting the depth to which the knives enter the work. The parts above enumerated, their actuating mechanism and their'mode of operation, together with other parts of .the channeling machine necessary to a disclosure of the present invention, are fully described in Letters Patent of the Umted States No. 984,773, grantedto United Shoe l'l lachinery Company on an application of William C. Meyer, February 21", 1211.

In the embodiment of the inventlon illustrated in the drawings the improved lipcent the channeling knife and the edge splitting knife. The tool is provided upon its work-engaging extremity with a slitting knife 22 arranged substantially vertical with relation to the upper surface of insures the widthwise slit.

the insole. The knife 22 is adapted to cut a transverse. or widthwise slit in. the free marginal portion of the inner lip at each actuation of the four-motion feeding device. Situated above the knife is a brow-like overhang or shoulder 24 projecting beyond the knife in the direction of the inner lip. The shoulder 24- is adapted during the lip-slitting operation to engage and slide over the uppersurface of the lip. Thus the shoulder 24 acts to maintain the lip in the channel or, expressed in another way, against the portion of the insole from which it was cut, which holds the free marginal portion of the lip directed toward the knife 22 and The tool 20 is vibrated or reciprocated toward and from the margin of the insole in. a plane substantially parallel with the upper surface of the insole, and during the slit-forming movement of the tool the shoulder 24 engages the upper 'surface'of the lip,which has been left by the channeling tool in a position raised somewhat above the upper surface of the insole,and: prevents the lip from movement away from the knife while the knife is cutting the transverse slit therein. It is to be observed that during the slitting operation the action of the shoulder in preventing the upward move.- ment of the inner lip compels the inner lip to be presented to the slitting knife substantially parallel to the direction of the cutting action of the knife. The. lip is therefore presented to the knife in a position to offer the greatest amount of resistance of which the material composing the insole is capable. The lip is held against upward movement by the. shoulder and against lateral movement by its junction with the body of the insole blank. Consequently. although the material of which the insole is composed may be very soft or. pliable, a transverse slit in the inner lip will neverthelessbe cut at each engagement of. the knife therewith.

. The lip-slitting tool. is. removably secured by a screw 26 to the lower end of a slitting tool lever 28 which is pivoted at its upper end on a stud 30 fixed-in the upper end of the shank of theknife carrier. This con-' struction is such that the slitting knife always occupies the same vertical relation with respect to the channeling and edge splitting knives during their changed vertical positions, due to variations in' the thickness of the insoles operated upon. The slitting knife is, therefore, always in proper position to engage and slit the inner lip; The slitting tool is vibrated continu ously during.v the operation of'the machine toward and from the margin of the insole by means of an adjustable link 32 pivotally connected. at its forward extremity with the knife slitting lever 28-, and at its rearward extremity with a cam lever 34:. The ca-m lever 34 is pivoted at 36 to the frame of the machine and carries at its free end a camv roll engaged by a cam path 88- in a cam 40. The cam a0 is secured to a; driving shaft 42, and at each rotation of the shaft the lever 28 is: oscillated and a vibration is im parted to the inner lip-slitting tool.

It will be obvious to those skilled in the art that the inventionis useful in. connection with the production of any sole: provided with a lip or lips of thecharacter described. Therefore, while aspecific embodiment of the present invention has been illustrated and described in connection with the, production ofaparticular type of insole, it will be understood. that the invention is not limited to the particular solev or the particular use, shown and described, since it. contemplates embodiment in any form in which the principles herein described may be carried into operation and falling within the scope of the appended claims.

T Vhatis claimed: as new, is.:-

1. A. machine for operating upon soles having, in combination, a work support, a lip slitting knife, and meansfor holding the lip down against the portion of the sole from which it is cut during. the lip slitting operation; v y c 2.. A machine for operating. upon soles having, in combination, a work support, and a lip-slitting tool comprising a lip-slitting knife and means for engaging the lip in advance of the knife and maintaining it sub stantially parallel to the plane of the sole during the lip-slitting operation with its free. marginal portion directed toward the knife. 7

3. A machine for operatingv upon. soles having, in combination, a work. support, and a lip-slitting tool comprising a lip-slitting knife and means for engaging the upper surface. of the liplcoiiperating with the knife for forming. transverse slits inthelip.

4. A. machine for. operating. upon soles having, in combination, means for feeding the sole, and a vibrating lip-slitting tool comprising a vertically disposed lip-slitting knife and a horizontally disposed lip engaging shoulder cooperating to form transverse slits in the lip.

5. A machine for operating upon soles provided with a lip formed by cutting downwardly and outwardly in the margin of one face having, in combination, work supporting means, a knife arranged to vibrate in a direction substantially parallel to the plane of the sole and transverse to the length of the lip, means for engaging and maintaining the lip substantially parallel to the plane of the sole, and means for actuating said knife to slit said lip while it is held down by the lip engaging means.

6. A machine for operating on soles having, in combination, a work support, and a reciprocating lip-slitting tool comprising a knife for cutting slits widthwise in the lip and a shoulder situated above the knife for preventing upward movement of the lip during the formation of the widthwise slits therein.

7. In a machine for operating on soles a reciprocating lip-slitting knife for forming transverse slits in the lip while it lies against the portion of the sole from which it was cut, means cooperating with the knife for preventing upward movement of the lip during the formation of the transverse slits therein, and means for actuating the knife.

8. In a machine for operating upon soles,

a vibrating lip-slitting tool comprising a lip-slitting knife and lip engaging means situated above and projecting forwardly beyond the knife, and means for vibrating the tool.

9. A lip-slitting tool for use in machines operating on soles consisting of a body portion comprising a houlder adapted to engage the upper surface of the lip during the lip-slitting operation, and a vertically arranged knife carried by the body portion below said shoulder.

ALBERT E. JOHNSON.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

. Washington, D. G.

Corrections in Letters Patent No. 1,243,944.

It is hereby certified that in Letters Patent No. 1,243,944, granted October 23,

1917, upon the application of Albert E. Johnson, of Beverly, Massachusetts, for an improvement in Lip-slitting Mechanism, errors appear in the printed specification requiring correction as follows: Page 1, line 87, for the word from read form; page 2, line 113, claim 1, for the word is read was; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 20th day of November, A. D., 1917.

R. F. WHITEHEAD,

Acting Commissioner of Patents.

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